/* ============================================================
   Deeprion Labs, blog + article styles
   ------------------------------------------------------------
   Loaded after tokens.css and styles.css. Reuses the brand
   shell, nav, footer, buttons, eyebrows, and glow from
   styles.css; adds the blog listing and the GEO article
   template (front-loaded answer, question headings, answer
   blocks, key takeaways, FAQ).
   ============================================================ */

/* ---------------- BREADCRUMB ---------------- */
.dl-breadcrumb { padding: 28px 0 0; }
.dl-breadcrumb ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--fg-3);
}
.dl-breadcrumb a { color: var(--fg-2); text-decoration: none; }
.dl-breadcrumb a:hover { color: var(--cyan-signal); }
.dl-breadcrumb li[aria-current="page"] { color: var(--fg-1); }
.dl-breadcrumb .sep { opacity: 0.5; }

/* ---------------- BLOG LISTING ---------------- */
.dl-blog-head { max-width: 720px; margin: 0 0 48px; }
.dl-blog-head h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 52px;
  line-height: 1.06;
  letter-spacing: -0.025em;
  color: var(--white-signal);
  margin: 16px 0 0;
}
.dl-blog-head p { font-size: 19px; line-height: 1.6; color: var(--fg-2); margin: 18px 0 0; }

.dl-blog-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 20px;
}
.dl-post-card {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-decoration: none;
  transition: border-color var(--transition), transform var(--transition);
}
.dl-post-card:hover { border-color: rgba(56, 189, 248, 0.4); transform: translateY(-3px); }
.dl-post-card-corner {
  position: absolute;
  top: 0;
  right: 0;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle at top right, rgba(56, 189, 248, 0.16), transparent 70%);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}
.dl-post-card:hover .dl-post-card-corner { opacity: 1; }
.dl-post-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-3);
  margin-bottom: 16px;
}
.dl-post-cat { color: var(--cyan-signal); }
.dl-post-meta .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--fg-3); }
.dl-post-card h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--fg-1);
  margin: 0 0 10px;
}
.dl-post-card p { font-size: 15px; line-height: 1.6; color: var(--fg-2); margin: 0 0 20px; }
.dl-post-readmore {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14px;
  color: var(--cyan-signal);
}
.dl-post-readmore .dl-ico { width: 16px; height: 16px; }

/* ---------------- ARTICLE ---------------- */
.dl-article { position: relative; overflow: hidden; padding: 0 0 40px; }
.dl-article-shell { max-width: 920px; margin: 0 auto; padding: 0 32px; }
/* the reading column is narrower than the page shell for line length */
.dl-article-col { max-width: 720px; }

.dl-article-header { margin: 24px 0 40px; }
.dl-article-header .dl-eyebrow { margin-bottom: 16px; }
.dl-article-header h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 46px;
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--white-signal);
  margin: 0;
}
.dl-byline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  margin-top: 22px;
  font-size: 14px;
  color: var(--fg-2);
}
.dl-byline .author { color: var(--fg-1); font-weight: 600; }
.dl-byline .sep { width: 3px; height: 3px; border-radius: 50%; background: var(--fg-3); }
.dl-byline time { color: var(--fg-2); }
.dl-byline .updated {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--cyan-signal);
  background: var(--cyan-soft);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: var(--radius-pill);
  padding: 3px 10px;
}

/* table of contents */
.dl-toc {
  background: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  margin: 0 0 40px;
}
.dl-toc h2 {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-3);
  margin: 0 0 14px;
}
.dl-toc ol { margin: 0; padding: 0 0 0 0; list-style: none; counter-reset: toc; }
.dl-toc li { counter-increment: toc; margin: 0 0 9px; padding-left: 28px; position: relative; }
.dl-toc li:last-child { margin-bottom: 0; }
.dl-toc li::before {
  content: counter(toc, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan-signal);
}
.dl-toc a { color: var(--fg-2); text-decoration: none; font-size: 15px; line-height: 1.4; }
.dl-toc a:hover { color: var(--cyan-signal); }

/* prose */
.dl-prose { font-size: 17px; line-height: 1.75; color: var(--fg-2); }
.dl-prose > p { margin: 0 0 22px; }
.dl-prose .lead { font-size: 19px; line-height: 1.7; color: var(--fg-1); }
.dl-prose h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 28px;
  line-height: 1.22;
  letter-spacing: -0.015em;
  color: var(--white-signal);
  margin: 48px 0 16px;
  scroll-margin-top: 88px;
}
.dl-prose h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.3;
  color: var(--fg-1);
  margin: 32px 0 12px;
}
.dl-prose a { color: var(--cyan-signal); text-decoration: underline; text-underline-offset: 2px; text-decoration-thickness: 1px; }
.dl-prose a:hover { color: #6fd0fb; }
.dl-prose strong { color: var(--fg-1); font-weight: 600; }
.dl-prose ul,
.dl-prose ol { margin: 0 0 22px; padding-left: 0; list-style: none; }
.dl-prose ul li,
.dl-prose ol li { position: relative; padding-left: 30px; margin: 0 0 12px; }
.dl-prose ul li::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan-signal);
  box-shadow: 0 0 8px var(--cyan-glow);
}
.dl-prose ol { counter-reset: pl; }
.dl-prose ol li { counter-increment: pl; }
.dl-prose ol li::before {
  content: counter(pl);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--cyan-signal);
}

/* "front-loaded answer" highlight band at the top of the article */
.dl-answer-first {
  border-left: 2px solid var(--cyan-signal);
  padding: 4px 0 4px 22px;
  margin: 0 0 28px;
}
.dl-answer-first p { color: var(--fg-1); }
.dl-answer-first p:last-child { margin-bottom: 0; }

/* key takeaways callout */
.dl-takeaways {
  background: var(--bg-1);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 28px 30px;
  margin: 40px 0;
}
.dl-takeaways h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 20px;
  color: var(--fg-1);
  margin: 0 0 16px;
}
.dl-takeaways ol { margin: 0; }

/* end-of-article CTA */
.dl-article-cta {
  position: relative;
  overflow: hidden;
  text-align: center;
  background: var(--bg-1);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 44px 32px;
  margin: 48px 0 0;
}
.dl-article-cta h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 28px;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--white-signal);
  margin: 0 auto;
  max-width: 22ch;
  position: relative;
  z-index: 1;
}
.dl-article-cta p { font-size: 16px; color: var(--fg-2); margin: 14px auto 24px; max-width: 46ch; position: relative; z-index: 1; }
.dl-article-cta .dl-btn { position: relative; z-index: 1; }

/* ---------------- FAQ ---------------- */
.dl-faq { margin: 56px 0 0; }
.dl-faq > h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 28px;
  letter-spacing: -0.015em;
  color: var(--white-signal);
  margin: 0 0 8px;
}
.dl-faq-sub { font-size: 15px; color: var(--fg-2); margin: 0 0 24px; }
.dl-faq-item {
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  padding: 20px 22px;
  margin: 0 0 12px;
}
.dl-faq-item h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 17px;
  line-height: 1.35;
  color: var(--fg-1);
  margin: 0 0 8px;
}
.dl-faq-item p { font-size: 15px; line-height: 1.65; color: var(--fg-2); margin: 0; }

/* ---------------- RELATED READING ---------------- */
.dl-related { margin: 56px 0 0; }
.dl-related > h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 22px;
  letter-spacing: -0.015em;
  color: var(--white-signal);
  margin: 0 0 18px;
}
.dl-related-list { display: grid; gap: 12px; }
.dl-related-item {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  text-decoration: none;
  transition: border-color var(--transition), transform var(--transition);
}
.dl-related-item:hover { border-color: rgba(56, 189, 248, 0.4); transform: translateY(-2px); }
.dl-related-cat {
  flex: none;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan-signal);
  background: var(--cyan-soft);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-pill);
  padding: 4px 10px;
}
.dl-related-title { font-family: var(--font-display); font-weight: 600; font-size: 16px; color: var(--fg-1); line-height: 1.3; }
.dl-related-item .dl-ico { margin-left: auto; width: 18px; height: 18px; color: var(--fg-3); flex: none; }
.dl-related-item:hover .dl-ico { color: var(--cyan-signal); }
@media (max-width: 560px) {
  .dl-related-item { flex-wrap: wrap; gap: 10px; }
  .dl-related-item .dl-ico { display: none; }
}

/* back link */
.dl-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--fg-2);
  text-decoration: none;
  margin-top: 48px;
}
.dl-back:hover { color: var(--cyan-signal); }
.dl-back .dl-ico { width: 16px; height: 16px; transform: rotate(180deg); }

/* ---------------- RESPONSIVE ---------------- */
@media (max-width: 900px) {
  .dl-article-shell { padding: 0 24px; }
  .dl-blog-head h1 { font-size: 40px; }
  .dl-article-header h1 { font-size: 34px; }
  .dl-prose { font-size: 16px; }
  .dl-prose h2 { font-size: 24px; }
}
@media (max-width: 560px) {
  .dl-article-shell { padding: 0 20px; }
  .dl-blog-head h1 { font-size: 32px; }
  .dl-article-header h1 { font-size: 28px; }
  .dl-blog-list { grid-template-columns: 1fr; }
}